On 09/21/2012 02:46 PM, David Rientjes wrote:
u32_array_open() is racy when multiple threads read from a file with a seek position of zero, i.e. when two or more simultaneous reads are occurring after the non-seekable files are created. It is possible that file->private_data is double-freed because the threads races betweenkfree(file->private-data); and file->private_data = NULL; The fix is to only do format_array_alloc() when the file is opened and free it when it is closed. This means that any thread that holds the file open and reads multiple times will see persistent data;
I think you meant we can read data only once. second time onwards we don't see any data. (except when fd is forked by child/ races in
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